Oxidative stress refers to an imbalance between the production of free radicals and the body's ability to neutralize them. This can lead to damage of cellular components such as DNA, proteins, and lipids. Oxidative stressors are agents that cause this imbalance by producing more free radicals than the body can handle. These may include environmental factors like pollution or exposure to radiation, but also lifestyle choices such as smoking, excessive alcohol consumption, or an unhealthy diet.